libdvdplay is an attempt to make a library from ogle dvd navigation code so
that a simple API provides access to both DVD Video data and DVD information to
a reader application.

libdvdplay is a layer over libdvdread. As a consequence it provides read, seek
for DVD media. But it also provides the client application with a set of access
functions needed to create an interface for the DVD reader (audio, subtitles,
titles ...).